Log barker



`uly 10, 1934.

C. B. THORNE ALOG BARKER Filed June 13 1952 4 Sheets-Sheet 2 July 10, 1934. C. Q THORNE 1,966,153

LOG BARKER Filed June 13, 1932 4 Sheets-Sheet 3 B7 FIG-3 July 10, 1934- c. B. THORNE 1,966,153

LOG BARKER Filed June 15, 1952 4 Sheets-Sheet 4 FIC-f1.4

/N VEN TOQ Patented July 10, 1934 iCE LOG BARKER Carl Busch Thorne, Hawkesbury, Ontario,

Canada Application .lune 13, 1932, Serial No. 616,899

2 Claims.

The invention relates to a log barker, as described in the present specication and illustrated in the accompanying drawings that form part of the same.

The invention consists essentially in creating within a receptacle opposing rolling forces under pressure contact of the log against one another as pointed out in the claims for` novelty following a description in detail of the preferable means employed for bringing into effect these principles of operation for the removal of the bark.

The objects of the invention are to insure despatch at a minimum expenditure of power and within a certain prescribed area thereby concentrating the operations and considerably reducing the expense in the matters of handling the logs and the transport of the same; to maintain a steady discharge corresponding with the feed 20 and avoid too great a diversity in the levels of the logs, thus eliminating the disadvantage of logs of considerable length or even shorter ones being tumbled about and out of line of the regular road which has a tendency to seriously upset the stripping of the bark and the continuity of operation; to insure a ready handling of the logs of greater diameter and of the mixed logs of smaller and greater diameters, for in most l operations this has been found to seriously hamper operations, whereas in Jthe present invention the varieties of the log sizes cannot hinder the rubbing and rolling movements, for in the circulation of the logs at one point they must go up from opposite directions and at another point they must go down from opposite directions, and this is assured, not by an agitation to effect the tumbling but rather by a progressive movement that insures the rolling and rubbing at considerlable force; and generally to provide in a niachine of this kind eiciency in stripping, economy in the consumption of power and a reduction in regard to the expense of labor.

In the drawings, Figure 1 is a longitudinal sectional view of the receptacle within which the stripping of the logs is eiected.

Figure 2 is a plan View.

Figure 3 is a cross sectional view through the complete receptacle or pocket on the line 3 3 in Figure 1, looking towards the feed.

Figure 4 is a cross sectional View on the line 4-4 looking towards the discharge.

Figure 5 is a cross sectional view through the complete pocket on the line 5-5 in Figure 1 55- looking towards the feed.

(Cl. D14-208) Figure 6 is a cross sectional View on the line 6-6 looking towards the discharge.

Like numerals of reference indicate corresponding parts in the various figures.

Referring to the drawings, the bed, indicated generally-by the numeral 15 is pierced by the longitudinal slots 16 :for the one set of cams 44, the slots 18 for another set of cams 45 and the slots 29 for another setoi cams 46. These slots in every instance cross a hollow, as indicated at 22, at 23 and at 24, these hollows being separated by the peaks 25 and 26 intermediate of the length of the receptacle, the hollow 22 extending into the shallow curved rise 27 ending in the inclined discharge 28 at a lower level than the feed end 29 extending into the incline 30.

Immediately below the incline 30, the wall of the receptacle or pocket is inwardly recessed at 3l meeting the fall 32 from the hollow 24. v

The bed l5 of the pocket is enclosed by the walls 33, and 34, and the platform 35 over which the logs are fed, extends outwardly from the structure, while the runway 36 from the discharge end receives the logs as they are rolled over the discharge incline.

The bed is supported by structural members 37 formed of steel or timbers and enclosed within the walls 33 and 34, this structure being according to the requirements for strength and convenience.

The shafts 38, 39 and 40 are journalled in the bearings 4l, 42 and 43 respectively and the cams 44, 45 and 46 are nxedly mounted on these shafts, there being as many cams as there are slots, both being provided to meet the demands of the machine.

The cams 44, 45 and 46 are preferably of the four blade type, each blade having the faces 47 receding from the forward direction of rotation.

The cam 46 rotates in an opposite direction to the cam 45 and the cam 44 in an opposite direction to the cam 45, which may mean that the cams 44 and 46 turn in a clockwise direction and the cam 45 in the opposite direction. This is all accounted for in the arrangement of the gear mechanism 48 and the driven shaft 49, the shaft 49 being driven through the pulley 51 connected to any suitable power. The blades of the cams rotate in the slots 20, 18 and 16.

In the operation of the invention, the principles involved include the circulation of the wood with increasing pressure due to the circuitous courses and the imaginary divisions made distinct only by the actual travel of the wood, as for example, the cam 46 maintains the movement of the logs in the direction of the recess 3l and these logs join the incoming logs and travel therewith and rub the central section of the logs, which are also moving backwards with the rst section of logs to the peak 26, this peak forming a dividing line in which the logs travel through the hollow 23, up the incline to the peak 25, which again forms a dividing line for the last section of travelling logs, driven by the cam 44 operating in a clockwise direction, and travelling upwardly with the logs from the middle section, the logs in the end section adjacent the discharge tumbling the stripped logs over the discharge incline.

The logs falling from the middle and the feed end section together fall to the peak 26 and there divide, and this means that these logs come into forced contact and naturally keep rolling against one another, thus stripping the bark oif.

The continuous rotation of the cam 46 in a clockwise direction allows the logs driven into the recess 31 to fall in behind the driven logs and be taken care of by the next blade of the cam.

This is happening all the time and there are of course plenty of logs for the pocket itself is quite deep, possibly one-third indepth of the length. So far as the width is concerned, it all depends on the logs handled.

The middle cam turns away from the feed end cam and this brings the logs down in the middle section and in contact with the downwardly falling logs in the end section and the faces or blades of this middle cam maintain the forward movement of the logs up to the peak 25.

The cam 44 is driving in the opposite direction to the middle cam, the consequence is thatwhen the logs from these two cams meet they rise upwardly and at the upper end divide, certain logs rolling backwardly to complete the middle circuit, while the others roll forwardly and are discharged. Those that are not discharged fall down the rise 27 to be forced upwardly by the cam 44.

The many logs progress in circuitous courses, because when taken into consideration with the great pile of logs in the pocket they fall down one after another in order to join in the progressive movement, for it is all progressive, and they swing around in circles always filling in behind the operating blades of the cams, so really the whole contents of the pocket are kept in movement, which means that the logs in every part are rolling into rubbing contact and yet advancing, which is very effective in stripping the bark and in building up a high pile for the discharge.

The level of the logs in the pocket shows comparatively little variation. There is a rise over the peak 25, and there is a dip over the peak 26, but that is more due to the feed at one end and the discharge at the other, where the increase in elevation materially assists in discharging the logs.

What I claim is:-

l. A log barker comprising a receptacle forming a pocket having a bed in peaks and hollows and between a curved rise at the discharge end and a deeper curved fall at the feed end, and cams rotatably mounted and driven and operating in said bed clockwise and reverse alternately.

2. In a log barker, a pocket having a longitudinal bed in inclines steeper and longer towards the discharge for building up a. summit for delivery purposes and forming peaks and hollows and rotating tumblers projecting upwardly in said hollows and operating in divers directions for maintaining the logs in rubbing contact and in progressive movement.

CARL BUSCH THORNE. 

